Knee Cast Cover for Shower Fit Knee Circumference 11.8" to 22.8", Waterproof Shower Bandage and Cast Protector for Knee Replacement and ACL Surgery, Wound, Burns Watertight Protection (New M2)Brand: KEEFITT Color: New M2 Features: Waterproof knee cast cover made of medical grade neoprene and plastic, fits upper knee circumference from 11. 8 to 22. 8 inches Upgraded knee shower protector uses 3mm thick imported neoprene, more durable and comfortable Adult knee cast shower protector, high elastic opening for easy on and off without pain or restriction of blood flow Self sealing protection, soft and comfortable, no tightness or stuffy feeling